Diversity of charge orderings in correlated systems.

  title={Diversity of charge orderings in correlated systems.},
  author={Konrad Jerzy Kapcia and Jan Barański and Andrzej Ptok},
  journal={Physical review. E},
  volume={96 4-1},
The phenomenon associated with inhomogeneous distribution of electron density is known as a charge ordering. In this work, we study the zero-bandwidth limit of the extended Hubbard model, which can be considered as a simple effective model of charge ordered insulators. It consists of the on-site interaction U and the intersite density-density interactions W_{1} and W_{2} between nearest neighbors and next-nearest neighbors, respectively. We derived the exact ground state diagrams for different… 

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